APA
Chen A., National Bureau of Economic Research, Oster E. & Williams H. (2014). Why is infant mortality higher in the US than in Europe?. Cambridge: NBER.
Chicago
Chen Alice, National Bureau of Economic Research, Oster Emily and Williams Heidi. 2014. Why is infant mortality higher in the US than in Europe?. Cambridge: NBER.
Harvard
Chen A., National Bureau of Economic Research, Oster E. and Williams H. (2014). Why is infant mortality higher in the US than in Europe?. Cambridge: NBER.
MLA
Chen Alice, National Bureau of Economic Research, Oster Emily and Williams Heidi. Why is infant mortality higher in the US than in Europe?. Cambridge: NBER. 2014.